diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..c3de74c
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,17 @@
+# SPDX-FileCopyrightText: 2026 LibreCode coop and contributors
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+version: 2
+updates:
+ - package-ecosystem: composer
+ directory: /
+ schedule:
+ interval: weekly
+ groups:
+ development-tooling:
+ dependency-type: development
+
+ - package-ecosystem: github-actions
+ directory: /
+ schedule:
+ interval: weekly
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..7067873
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,143 @@
+# SPDX-FileCopyrightText: 2026 LibreCode coop and contributors
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+name: CI
+
+on:
+ pull_request:
+ push:
+ branches:
+ - main
+
+permissions:
+ contents: read
+
+concurrency:
+ group: client-ci-${{ github.ref }}
+ cancel-in-progress: true
+
+jobs:
+ test:
+ name: PHP ${{ matrix.php }}
+ runs-on: ubuntu-latest
+ strategy:
+ fail-fast: false
+ matrix:
+ php: ['8.1', '8.4', '8.5']
+ steps:
+ - name: Checkout
+ uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+ with:
+ persist-credentials: false
+
+ - name: Set up PHP
+ uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2.37.2
+ with:
+ php-version: ${{ matrix.php }}
+ coverage: none
+ tools: composer
+
+ - name: Validate Composer metadata
+ run: composer validate --strict
+
+ - name: Install dependencies
+ run: composer install --no-interaction --prefer-dist
+
+ - name: Test
+ run: composer test
+
+ coverage:
+ name: Coverage
+ runs-on: ubuntu-latest
+ steps:
+ - name: Checkout
+ uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+ with:
+ persist-credentials: false
+
+ - name: Set up PHP
+ uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2.37.2
+ with:
+ php-version: '8.4'
+ coverage: xdebug
+ tools: composer
+
+ - name: Install dependencies
+ run: composer install --no-interaction --prefer-dist
+
+ - name: Measure coverage
+ run: composer test:coverage
+
+ - name: Enforce coverage threshold
+ run: php tests/coverage-threshold.php build/coverage.xml 75
+
+ quality:
+ name: Quality
+ runs-on: ubuntu-latest
+ steps:
+ - name: Checkout
+ uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+ with:
+ persist-credentials: false
+
+ - name: Set up PHP
+ uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2.37.2
+ with:
+ php-version: '8.4'
+ coverage: none
+ tools: composer
+
+ - name: Install dependencies
+ run: composer install --no-interaction --prefer-dist
+
+ - name: Lint
+ run: composer lint
+
+ - name: Coding standard
+ run: composer phpcs
+
+ - name: Static analysis
+ run: composer phpstan
+
+ - name: Security audit
+ run: composer audit --no-interaction
+
+ scoping:
+ name: Namespace scoping
+ runs-on: ubuntu-latest
+ steps:
+ - name: Checkout
+ uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+ with:
+ persist-credentials: false
+
+ - name: Set up PHP
+ uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2.37.2
+ with:
+ php-version: '8.4'
+ coverage: none
+ tools: composer
+
+ - name: Install dependencies
+ run: composer install --no-interaction --prefer-dist
+
+ - name: Install PHP-Scoper
+ run: composer global require --no-interaction humbug/php-scoper:^0.18.17
+
+ - name: Prefix package namespace
+ run: "$(composer global config bin-dir --absolute)/php-scoper" add-prefix --prefix=UsageStatisticsClientScoped --output-dir=build/scoped --force src
+
+ - name: Load scoped package
+ run: php tests/scoping-smoke.php
+
+ reuse:
+ name: REUSE
+ runs-on: ubuntu-latest
+ steps:
+ - name: Checkout
+ uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+ with:
+ persist-credentials: false
+
+ - name: REUSE compliance
+ uses: fsfe/reuse-action@676e2d560c9a403aa252096d99fcab3e1132b0f5 # v6.0.0
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a914a23
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+/vendor/
+/build/
+/.phpunit.cache/
+/.phpunit.result.cache
+/.phpstan-cache/
+/coverage.xml
diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 0000000..8b39a83
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,17 @@
+
+
+# Contributor notes
+
+This is a small framework-agnostic Protocol v1 client. Keep runtime dependencies and the public API minimal.
+
+- Source: `src/`
+- Tests: `tests/`
+- Design and integration notes: `docs/`
+- Protocol source of truth: `LibreCodeCoop/usage_statistics_server/docs/protocol-v1.md`
+
+Run `composer qa` and `composer audit` before committing. Validate scoping as described in `docs/development.md` when changing namespaces or public contracts.
+
+Use Conventional Commits and `git commit -s`. Do not add application-specific LibreSign/Nextcloud code to the package core.
diff --git a/LICENSES/AGPL-3.0-or-later.txt b/LICENSES/AGPL-3.0-or-later.txt
new file mode 100644
index 0000000..9e3b16e
--- /dev/null
+++ b/LICENSES/AGPL-3.0-or-later.txt
@@ -0,0 +1,232 @@
+GNU AFFERO GENERAL PUBLIC LICENSE
+Version 3, 19 November 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc.
+
+Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
+
+ Preamble
+
+The GNU Affero General Public License is a free, copyleft license for software and other kinds of works, specifically designed to ensure cooperation with the community in the case of network server software.
+
+The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, our General Public Licenses are intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users.
+
+When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things.
+
+Developers that use our General Public Licenses protect your rights with two steps: (1) assert copyright on the software, and (2) offer you this License which gives you legal permission to copy, distribute and/or modify the software.
+
+A secondary benefit of defending all users' freedom is that improvements made in alternate versions of the program, if they receive widespread use, become available for other developers to incorporate. Many developers of free software are heartened and encouraged by the resulting cooperation. However, in the case of software used on network servers, this result may fail to come about. The GNU General Public License permits making a modified version and letting the public access it on a server without ever releasing its source code to the public.
+
+The GNU Affero General Public License is designed specifically to ensure that, in such cases, the modified source code becomes available to the community. It requires the operator of a network server to provide the source code of the modified version running there to the users of that server. Therefore, public use of a modified version, on a publicly accessible server, gives the public access to the source code of the modified version.
+
+An older license, called the Affero General Public License and published by Affero, was designed to accomplish similar goals. This is a different license, not a version of the Affero GPL, but Affero has released a new version of the Affero GPL which permits relicensing under this license.
+
+The precise terms and conditions for copying, distribution and modification follow.
+
+ TERMS AND CONDITIONS
+
+0. Definitions.
+
+"This License" refers to version 3 of the GNU Affero General Public License.
+
+"Copyright" also means copyright-like laws that apply to other kinds of works, such as semiconductor masks.
+
+"The Program" refers to any copyrightable work licensed under this License. Each licensee is addressed as "you". "Licensees" and "recipients" may be individuals or organizations.
+
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+
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+
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+
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+
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+
+1. Source Code.
+The "source code" for a work means the preferred form of the work for making modifications to it. "Object code" means any non-source form of a work.
+
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+
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+
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+
+2. Basic Permissions.
+All rights granted under this License are granted for the term of copyright on the Program, and are irrevocable provided the stated conditions are met. This License explicitly affirms your unlimited permission to run the unmodified Program. The output from running a covered work is covered by this License only if the output, given its content, constitutes a covered work. This License acknowledges your rights of fair use or other equivalent, as provided by copyright law.
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+
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+No covered work shall be deemed part of an effective technological measure under any applicable law fulfilling obligations under article 11 of the WIPO copyright treaty adopted on 20 December 1996, or similar laws prohibiting or restricting circumvention of such measures.
+
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+
+4. Conveying Verbatim Copies.
+You may convey verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice; keep intact all notices stating that this License and any non-permissive terms added in accord with section 7 apply to the code; keep intact all notices of the absence of any warranty; and give all recipients a copy of this License along with the Program.
+
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+
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+You may convey a work based on the Program, or the modifications to produce it from the Program, in the form of source code under the terms of section 4, provided that you also meet all of these conditions:
+
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+
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+
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+
+6. Conveying Non-Source Forms.
+You may convey a covered work in object code form under the terms of sections 4 and 5, provided that you also convey the machine-readable Corresponding Source under the terms of this License, in one of these ways:
+
+ a) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by the Corresponding Source fixed on a durable physical medium customarily used for software interchange.
+
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+
+7. Additional Terms.
+"Additional permissions" are terms that supplement the terms of this License by making exceptions from one or more of its conditions. Additional permissions that are applicable to the entire Program shall be treated as though they were included in this License, to the extent that they are valid under applicable law. If additional permissions apply only to part of the Program, that part may be used separately under those permissions, but the entire Program remains governed by this License without regard to the additional permissions.
+
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+
+You may not propagate or modify a covered work except as expressly provided under this License. Any attempt otherwise to propagate or modify it is void, and will automatically terminate your rights under this License (including any patent licenses granted under the third paragraph of section 11).
+
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+
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+
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+
+You are not required to accept this License in order to receive or run a copy of the Program. Ancillary propagation of a covered work occurring solely as a consequence of using peer-to-peer transmission to receive a copy likewise does not require acceptance. However, nothing other than this License grants you permission to propagate or modify any covered work. These actions infringe copyright if you do not accept this License. Therefore, by modifying or propagating a covered work, you indicate your acceptance of this License to do so.
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+11. Patents.
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+A contributor's "essential patent claims" are all patent claims owned or controlled by the contributor, whether already acquired or hereafter acquired, that would be infringed by some manner, permitted by this License, of making, using, or selling its contributor version, but do not include claims that would be infringed only as a consequence of further modification of the contributor version. For purposes of this definition, "control" includes the right to grant patent sublicenses in a manner consistent with the requirements of this License.
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+
+Nothing in this License shall be construed as excluding or limiting any implied license or other defenses to infringement that may otherwise be available to you under applicable patent law.
+
+12. No Surrender of Others' Freedom.
+
+If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not convey it at all. For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program.
+
+13. Remote Network Interaction; Use with the GNU General Public License.
+
+Notwithstanding any other provision of this License, if you modify the Program, your modified version must prominently offer all users interacting with it remotely through a computer network (if your version supports such interaction) an opportunity to receive the Corresponding Source of your version by providing access to the Corresponding Source from a network server at no charge, through some standard or customary means of facilitating copying of software. This Corresponding Source shall include the Corresponding Source for any work covered by version 3 of the GNU General Public License that is incorporated pursuant to the following paragraph.
+
+Notwithstanding any other provision of this License, you have permission to link or combine any covered work with a work licensed under version 3 of the GNU General Public License into a single combined work, and to convey the resulting work. The terms of this License will continue to apply to the part which is the covered work, but the work with which it is combined will remain governed by version 3 of the GNU General Public License.
+
+14. Revised Versions of this License.
+
+The Free Software Foundation may publish revised and/or new versions of the GNU Affero General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program specifies that a certain numbered version of the GNU Affero General Public License "or any later version" applies to it, you have the option of following the terms and conditions either of that numbered version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of the GNU Affero General Public License, you may choose any version ever published by the Free Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions of the GNU Affero General Public License can be used, that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the Program.
+
+Later license versions may give you additional or different permissions. However, no additional obligations are imposed on any author or copyright holder as a result of your choosing a later version.
+
+15. Disclaimer of Warranty.
+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+16. Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found.
+
+
+ Copyright (C)
+
+ This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License along with this program. If not, see .
+
+Also add information on how to contact you by electronic and paper mail.
+
+If your software can interact with users remotely through a computer network, you should also make sure that it provides a way for users to get its source. For example, if your program is a web application, its interface could display a "Source" link that leads users to an archive of the code. There are many ways you could offer source, and different solutions will be better for different programs; see section 13 for the specific requirements.
+
+You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU AGPL, see .
diff --git a/README.md b/README.md
index 9aa0e14..1487b0f 100644
--- a/README.md
+++ b/README.md
@@ -1,49 +1,83 @@
+
+
# Usage Statistics Client
-Reusable PHP/Composer client primitives for applications that want to collect and submit opt-in, privacy-preserving usage statistics.
+Framework-agnostic PHP client for applications that submit opt-in usage statistics using [Usage Statistics Protocol v1](https://github.com/LibreCodeCoop/usage_statistics_server/blob/main/docs/protocol-v1.md).
+
+The package provides typed report primitives, pseudonymous installation-ID derivation, consent gating, payload serialization, a small HTTP transport boundary, and response/error handling. Applications remain responsible for their metrics, consent UI and persistence, endpoint configuration, scheduling, and logging policy.
+
+## Requirements
+
+- PHP 8.1 or newer
+- Composer
+- an HTTPS report endpoint compatible with Protocol v1
+
+## Install
-The package is designed to be application-agnostic. Applications own their metric definitions, consent experience, and default receiving endpoint.
+```bash
+composer require vitormattos/usage-statistics-client
+```
-## Responsibilities
+## Minimal use
-The client package is expected to provide:
+```php
+use LibreCode\UsageStatistics\Client;
+use LibreCode\UsageStatistics\ConsentState;
+use LibreCode\UsageStatistics\Endpoint;
+use LibreCode\UsageStatistics\InstallationId;
+use LibreCode\UsageStatistics\Metric;
+use LibreCode\UsageStatistics\Report;
+use LibreCode\UsageStatistics\ReportingPeriod;
+use LibreCode\UsageStatistics\Transport\StreamTransport;
-- provider contracts for application-defined metrics;
-- report and metric value objects;
-- reporting-period helpers;
-- consent-state persistence abstractions;
-- pseudonymous installation identifier helpers;
-- endpoint resolution with application default plus administrator override;
-- payload validation and serialization;
-- HTTPS report submission;
-- last-successful-send state;
-- helpers for background jobs and OCC commands in Nextcloud applications.
+$installationId = InstallationId::derive('libresign', $localInstallationIdentifier);
-## Explicit non-responsibilities
+$report = new Report(
+ application: 'libresign',
+ installationId: (string)$installationId,
+ schemaVersion: 1,
+ period: ReportingPeriod::monthContaining(new DateTimeImmutable('2026-08-15T00:00:00Z')),
+ metrics: [
+ Metric::string('environment', 'version', '12.0.0'),
+ Metric::integer('usage', 'requests_completed', 72),
+ ],
+);
-The package does not:
+$client = new Client(
+ new StreamTransport(),
+ new Endpoint('https://statistics.example/apps/usage_statistics_server/api/v1/reports'),
+);
-- decide which metrics an application should collect;
-- provide a global LibreSign endpoint;
-- silently enable reporting;
-- own application-specific settings pages;
-- require or integrate with Nextcloud `survey_client`;
-- claim to verify the truthfulness of values reported by a self-hosted client.
+$result = $client->submit($report, ConsentState::Enabled);
+```
-## Consent model
+`unknown` and `disabled` consent states never send a request. Network and HTTP failures are surfaced to the application; the client deliberately does not retry automatically, so a background scheduler can decide when to try again without blocking normal application work.
-The planned shared consent state is tri-state:
+## Design constraints
-- `unknown`: no decision has been recorded;
-- `enabled`: the administrator opted in;
-- `disabled`: the administrator opted out.
+- no Nextcloud or LibreSign runtime dependency;
+- no PSR-7/PSR-18 contract exposed in the public API;
+- no authentication, signing, or attestation invented beyond Protocol v1;
+- no automatic logging of report payloads;
+- no user-level event model;
+- runtime dependencies are intentionally zero.
-Applications decide when and how to present the initial request. Once a decision is recorded, the client library must not independently prompt again.
+The package is designed so its own namespace can be prefixed when bundled into isolated dependency trees such as LibreSign's `3rdparty` directory.
-## Protocol
+## Documentation
-The initial implementation targets Usage Statistics Protocol v1 defined by the server project.
+- [Architecture](docs/architecture.md)
+- [Integration](docs/integration.md)
+- [Privacy](docs/privacy.md)
+- [PHP-Scoper](docs/php-scoper.md)
+- [Mozart](docs/mozart.md)
+- [Versioning](docs/versioning.md)
+- [Development](docs/development.md)
+- [Troubleshooting](docs/troubleshooting.md)
-## Status
+## License
-Early design and implementation.
+AGPL-3.0-or-later. See `LICENSES/AGPL-3.0-or-later.txt`.
diff --git a/REUSE.toml b/REUSE.toml
new file mode 100644
index 0000000..0bc73bd
--- /dev/null
+++ b/REUSE.toml
@@ -0,0 +1,21 @@
+# SPDX-FileCopyrightText: 2026 LibreCode coop and contributors
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+version = 1
+SPDX-PackageName = "usage-statistics-client"
+SPDX-PackageDownloadLocation = "https://github.com/vitormattos/usage_statistics_client/"
+
+default-license = "AGPL-3.0-or-later"
+default-copyright = "2026 LibreCode coop and contributors"
+
+[[annotations]]
+path = [
+ ".gitignore",
+ "composer.json",
+ "phpcs.xml.dist",
+ "phpstan.neon",
+ "phpunit.xml.dist"
+]
+precedence = "aggregate"
+SPDX-FileCopyrightText = "2026 LibreCode coop and contributors"
+SPDX-License-Identifier = "AGPL-3.0-or-later"
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..b79e7a6
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,50 @@
+{
+ "name": "vitormattos/usage-statistics-client",
+ "description": "Framework-agnostic PHP client for the Usage Statistics Protocol.",
+ "type": "library",
+ "license": "AGPL-3.0-or-later",
+ "keywords": [
+ "telemetry",
+ "usage-statistics",
+ "privacy",
+ "php"
+ ],
+ "require": {
+ "php": ">=8.1"
+ },
+ "require-dev": {
+ "phpstan/phpstan": "^2.1",
+ "phpunit/phpunit": "^10.5 || ^11.5 || ^12.0",
+ "squizlabs/php_codesniffer": "^3.13"
+ },
+ "autoload": {
+ "psr-4": {
+ "LibreCode\\UsageStatistics\\": "src/"
+ }
+ },
+ "autoload-dev": {
+ "psr-4": {
+ "LibreCode\\UsageStatistics\\Tests\\": "tests/"
+ }
+ },
+ "scripts": {
+ "lint": "find src tests -name '*.php' -print0 | xargs -0 -n1 php -l",
+ "test": "phpunit --colors=always --fail-on-warning --fail-on-risky",
+ "test:coverage": "XDEBUG_MODE=coverage phpunit --coverage-text --coverage-clover build/coverage.xml",
+ "phpstan": "phpstan analyse -c phpstan.neon",
+ "phpcs": "phpcs -q",
+ "qa": [
+ "@lint",
+ "@phpcs",
+ "@phpstan",
+ "@test"
+ ]
+ },
+ "support": {
+ "issues": "https://github.com/vitormattos/usage_statistics_client/issues",
+ "source": "https://github.com/vitormattos/usage_statistics_client"
+ },
+ "config": {
+ "sort-packages": true
+ }
+}
diff --git a/docs/architecture.md b/docs/architecture.md
new file mode 100644
index 0000000..9376ec3
--- /dev/null
+++ b/docs/architecture.md
@@ -0,0 +1,22 @@
+
+
+# Architecture
+
+The package keeps the supported surface deliberately small.
+
+`Metric`, `ReportingPeriod`, `Report`, `InstallationId`, `Endpoint`, `ConsentState`, `Client`, and the transport types form the public API. Application-specific metric definitions, settings pages, persistence, background jobs, OCC commands, and logging stay in the host application.
+
+The flow is:
+
+```text
+application metrics -> Report -> consent gate -> JSON serialization -> TransportInterface -> server
+```
+
+The client performs stable Protocol v1 validations that catch programming errors before a request: identifier syntax and lengths, metric type/value compatibility, duplicate metrics, positive schema version, metric-count bounds, and the 31-day maximum reporting period. It does not duplicate server-side schema registration or administrative validation.
+
+`TransportInterface` belongs to this package instead of exposing PSR-18/PSR-7. This is intentional: a consumer that prefixes the complete dependency tree must not accidentally make a prefixed PSR interface incompatible with an unprefixed object supplied by the host application.
+
+`StreamTransport` is a zero-dependency default. Consumers may replace it with an adapter around their framework HTTP client.
diff --git a/docs/development.md b/docs/development.md
new file mode 100644
index 0000000..808af28
--- /dev/null
+++ b/docs/development.md
@@ -0,0 +1,40 @@
+
+
+# Development
+
+Install dependencies:
+
+```bash
+composer install
+```
+
+Run the main checks:
+
+```bash
+composer qa
+composer audit
+```
+
+Run coverage when Xdebug or PCOV coverage is available:
+
+```bash
+composer test:coverage
+```
+
+Validate namespace prefixing:
+
+```bash
+rm -rf build/scoped
+composer global require humbug/php-scoper:^0.18.17
+"$(composer global config bin-dir --absolute)/php-scoper" add-prefix --prefix=UsageStatisticsClientScoped --output-dir=build/scoped --force src
+php tests/scoping-smoke.php
+```
+
+Commits use Conventional Commits and Developer Certificate of Origin sign-off, for example:
+
+```bash
+git commit -s -m 'feat: add report submission client'
+```
diff --git a/docs/integration.md b/docs/integration.md
new file mode 100644
index 0000000..2e62899
--- /dev/null
+++ b/docs/integration.md
@@ -0,0 +1,32 @@
+
+
+# Application integration
+
+The host application owns five decisions: its stable application ID, schema version, metric definitions, consent persistence, and report endpoint.
+
+## Consent
+
+Persist consent in the host application's normal settings store. Translate it to `ConsentState` immediately before submission. `unknown` and `disabled` both cause `Client::submit()` to return `SubmissionResult::SkippedWithoutConsent` without invoking the transport.
+
+The library never prompts a user and never changes consent state.
+
+## Endpoint
+
+Pass the complete Protocol v1 report URL to `Endpoint`. It must use HTTPS and must not contain embedded credentials, a query string, or a fragment. Applications may ship their own default and expose an administrator override.
+
+Do not put a LibreSign-specific default in shared library code.
+
+## Scheduling
+
+Run reporting from the host application's background-job mechanism. A monthly calendar period is the initial recommended cadence. `ReportingPeriod::monthContaining()` is provided for that common case.
+
+The client does not retry internally. On `TransportException` or `ServerRejectedException::isTransient() === true`, let a later scheduled execution decide whether to retry. This keeps telemetry failures outside latency-sensitive application paths.
+
+## Transport adapters
+
+A framework can implement `TransportInterface` around its existing HTTP client. The adapter receives the method, absolute URL, headers, JSON body, and total timeout, and returns a small `Response` object.
+
+Do not log the request body by default. A malformed host integration could accidentally add sensitive data even though the protocol forbids it.
diff --git a/docs/mozart.md b/docs/mozart.md
new file mode 100644
index 0000000..7d3e630
--- /dev/null
+++ b/docs/mozart.md
@@ -0,0 +1,14 @@
+
+
+# Mozart
+
+Mozart and PHP-Scoper solve related packaging problems but do not use the same build model. Mozart is normally configured by the consuming project to copy and prefix selected Composer dependencies into that project's own dependency namespace.
+
+For this package, configure the consumer to treat `vitormattos/usage-statistics-client` as a dependency to be copied and prefix the `LibreCode\\UsageStatistics\\` namespace into the consumer's private vendor namespace.
+
+Do not prefix only third-party dependencies while leaving this package global if the goal is to let two host applications load different client versions in one PHP process. The package namespace itself must also be isolated.
+
+The exact Mozart configuration depends on the consumer's Mozart version and packaging layout, so this repository does not ship a consumer-specific `mozart.json`. The important compatibility property is that the client contains no hard-coded original FQCN strings or unprefixable runtime dependency.
diff --git a/docs/php-scoper.md b/docs/php-scoper.md
new file mode 100644
index 0000000..87ba6ae
--- /dev/null
+++ b/docs/php-scoper.md
@@ -0,0 +1,21 @@
+
+
+# PHP-Scoper
+
+The package is intended to tolerate prefixing of its complete namespace. It has no runtime Composer dependency and exposes no third-party interface in its public API.
+
+A minimal build-time smoke command is:
+
+```bash
+vendor/bin/php-scoper add-prefix \
+ --prefix=OCA\\LibreSign\\Vendor \
+ --output-dir=build/scoped \
+ --force src
+```
+
+A consumer should normally scope the package as part of its complete vendor build rather than scope only `src/` in isolation. Rebuild Composer autoload metadata after producing the scoped tree according to the consuming application's packaging process.
+
+The repository CI runs a smoke build with PHP-Scoper and loads scoped public classes. If a future public API introduces third-party contracts, revisit scoping before releasing that change.
diff --git a/docs/privacy.md b/docs/privacy.md
new file mode 100644
index 0000000..584cfdd
--- /dev/null
+++ b/docs/privacy.md
@@ -0,0 +1,16 @@
+
+
+# Privacy model
+
+Protocol v1 is for opt-in aggregate usage statistics. It is not a user-event tracking protocol.
+
+Applications must not submit names, email addresses, user IDs, document or file names, document contents, raw instance URLs or hostnames, authentication material, secrets, IP addresses as metric values, or individual user event streams.
+
+`InstallationId::derive()` hashes a domain-separated combination of the application ID and a host-provided local installation identifier. This makes the resulting 64-character identifier stable for the same application and local installation while preventing the raw identifier from being sent. Different application IDs produce different derived identifiers for the same local input.
+
+This is pseudonymization, not anonymization. If the local input has low entropy and becomes known to an observer, it may be guessable. Applications should use a stable, non-public installation identifier as input and must not pass a hostname, URL, email, user ID, token, or secret as the report identifier itself.
+
+Transport infrastructure can still observe metadata such as source IP addresses. Server logging and retention are separate operational concerns.
diff --git a/docs/troubleshooting.md b/docs/troubleshooting.md
new file mode 100644
index 0000000..dcc88a9
--- /dev/null
+++ b/docs/troubleshooting.md
@@ -0,0 +1,26 @@
+
+
+# Troubleshooting
+
+## Nothing was sent
+
+Check the consent state first. `unknown` and `disabled` deliberately return `SkippedWithoutConsent` without touching the transport.
+
+## `TransportException`
+
+The endpoint could not be reached or the transport could not obtain a valid HTTP response. Keep telemetry failures out of the application's primary operation and let a later background-job execution retry when appropriate.
+
+## `ServerRejectedException`
+
+Inspect `statusCode` and `errorCode`. Protocol v1 currently uses `400 invalid_report` for invalid reports and `409 conflicting_report` when another schema version was already accepted for the same logical reporting period. `429` and `5xx` responses are classified as transient by `isTransient()`.
+
+## `ProtocolException`
+
+The server returned a success response that does not match the Protocol v1 `{"status":"accepted"}` contract or returned invalid JSON.
+
+## Schema registration errors
+
+The client cannot register application schemas. The `(application, schemaVersion)` definition must already exist on the Usage Statistics Server.
diff --git a/docs/versioning.md b/docs/versioning.md
new file mode 100644
index 0000000..b140c74
--- /dev/null
+++ b/docs/versioning.md
@@ -0,0 +1,16 @@
+
+
+# Versioning
+
+The package follows Semantic Versioning.
+
+Public classes, enums, interfaces, constructor signatures, return types, exception contracts, and serialized Protocol v1 behavior are part of the supported API once a stable release is published.
+
+A protocol schema version is not a package version. Applications can update their metric schema independently by sending the appropriate `schemaVersion` registered on the server.
+
+Protocol evolution must be explicit. A future Protocol v2 must not silently change Protocol v1 serialization or response handling.
+
+Deprecated public APIs should remain functional for at least one normal minor-release migration window before removal in the next major release, unless a security issue requires faster action.
diff --git a/phpcs.xml.dist b/phpcs.xml.dist
new file mode 100644
index 0000000..f7740b5
--- /dev/null
+++ b/phpcs.xml.dist
@@ -0,0 +1,10 @@
+
+
+ PSR-12 coding standard for the Usage Statistics Client.
+ src
+ tests
+
+
+
+
+
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..c7ca44a
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,6 @@
+parameters:
+ level: max
+ paths:
+ - src
+ - tests
+ tmpDir: .phpstan-cache
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
new file mode 100644
index 0000000..abf30f8
--- /dev/null
+++ b/phpunit.xml.dist
@@ -0,0 +1,17 @@
+
+
+
+
+ tests
+
+
+
+
+ src
+
+
+
diff --git a/src/Client.php b/src/Client.php
new file mode 100644
index 0000000..8182f13
--- /dev/null
+++ b/src/Client.php
@@ -0,0 +1,93 @@
+toArray(), JSON_THROW_ON_ERROR | JSON_UNESCAPED_SLASHES);
+ } catch (JsonException $e) {
+ throw new ProtocolException('Unable to serialize report.', 0, $e);
+ }
+
+ $response = $this->transport->request(
+ 'POST',
+ $this->endpoint->url,
+ [
+ 'Accept' => 'application/json',
+ 'Content-Type' => 'application/json',
+ ],
+ $payload,
+ $this->timeoutSeconds,
+ );
+
+ if ($response->statusCode !== 200) {
+ [$errorCode, $message] = $this->parseError($response->body);
+ throw new ServerRejectedException(
+ $response->statusCode,
+ $errorCode,
+ $message ?? 'Usage statistics server rejected the report.',
+ $response->header('retry-after'),
+ );
+ }
+
+ try {
+ $body = json_decode($response->body, true, 512, JSON_THROW_ON_ERROR);
+ } catch (JsonException $e) {
+ throw new ProtocolException('Usage statistics server returned invalid JSON.', 0, $e);
+ }
+
+ if (!is_array($body) || ($body['status'] ?? null) !== 'accepted') {
+ throw new ProtocolException('Usage statistics server returned an unexpected success response.');
+ }
+
+ return SubmissionResult::Accepted;
+ }
+
+ /** @return array{0:?string,1:?string} */
+ private function parseError(string $body): array
+ {
+ try {
+ $decoded = json_decode($body, true, 512, JSON_THROW_ON_ERROR);
+ } catch (JsonException) {
+ return [null, null];
+ }
+
+ if (!is_array($decoded)) {
+ return [null, null];
+ }
+
+ return [
+ is_string($decoded['error'] ?? null) ? $decoded['error'] : null,
+ is_string($decoded['message'] ?? null) ? $decoded['message'] : null,
+ ];
+ }
+}
diff --git a/src/ConsentState.php b/src/ConsentState.php
new file mode 100644
index 0000000..353aac4
--- /dev/null
+++ b/src/ConsentState.php
@@ -0,0 +1,17 @@
+url = rtrim($url, '/');
+ }
+
+ public function __toString(): string
+ {
+ return $this->url;
+ }
+}
diff --git a/src/Exception/ProtocolException.php b/src/Exception/ProtocolException.php
new file mode 100644
index 0000000..68c6105
--- /dev/null
+++ b/src/Exception/ProtocolException.php
@@ -0,0 +1,16 @@
+statusCode === 429 || $this->statusCode >= 500;
+ }
+}
diff --git a/src/Exception/TransportException.php b/src/Exception/TransportException.php
new file mode 100644
index 0000000..e3a0f7b
--- /dev/null
+++ b/src/Exception/TransportException.php
@@ -0,0 +1,16 @@
+ 128
+ || preg_match(self::APPLICATION_PATTERN, $application) !== 1
+ ) {
+ throw new InvalidArgumentException('Application identifier is invalid.');
+ }
+ if ($localInstallationIdentifier === '') {
+ throw new InvalidArgumentException('Local installation identifier must not be empty.');
+ }
+
+ $input = "usage-statistics:v1\0" . $application . "\0" . $localInstallationIdentifier;
+
+ return new self(hash('sha256', $input));
+ }
+
+ public function __toString(): string
+ {
+ return $this->value;
+ }
+}
diff --git a/src/Metric.php b/src/Metric.php
new file mode 100644
index 0000000..9641385
--- /dev/null
+++ b/src/Metric.php
@@ -0,0 +1,81 @@
+ self::MAX_STRING_VALUE_LENGTH) {
+ throw new InvalidArgumentException('String metric value exceeds 1024 bytes.');
+ }
+
+ return new self($category, $key, 'string', $value);
+ }
+
+ /** @return array{category:string,key:string,type:string,value:string|int|float|bool} */
+ public function toArray(): array
+ {
+ return [
+ 'category' => $this->category,
+ 'key' => $this->key,
+ 'type' => $this->type,
+ 'value' => $this->value,
+ ];
+ }
+
+ public function identity(): string
+ {
+ return $this->category . "\0" . $this->key;
+ }
+
+ private static function assertIdentifier(string $value, string $field, int $maxLength): void
+ {
+ if ($value === '' || strlen($value) > $maxLength || preg_match(self::IDENTIFIER_PATTERN, $value) !== 1) {
+ throw new InvalidArgumentException($field . ' is invalid.');
+ }
+ }
+}
diff --git a/src/Report.php b/src/Report.php
new file mode 100644
index 0000000..60a27ea
--- /dev/null
+++ b/src/Report.php
@@ -0,0 +1,73 @@
+ */
+ public readonly array $metrics;
+
+ /** @param list $metrics */
+ public function __construct(
+ public readonly string $application,
+ public readonly string $installationId,
+ public readonly int $schemaVersion,
+ public readonly ReportingPeriod $period,
+ array $metrics,
+ ) {
+ self::assertIdentifier($application, 'Application', 128);
+ self::assertIdentifier($installationId, 'Installation ID', 128);
+ if ($schemaVersion < 1) {
+ throw new InvalidArgumentException('Schema version must be a positive integer.');
+ }
+ if ($metrics === [] || count($metrics) > self::MAX_METRICS) {
+ throw new InvalidArgumentException('Report must contain between 1 and 256 metrics.');
+ }
+
+ $seen = [];
+ foreach ($metrics as $metric) {
+ if (!$metric instanceof Metric) {
+ throw new InvalidArgumentException('Every report metric must be a Metric instance.');
+ }
+ $identity = $metric->identity();
+ if (isset($seen[$identity])) {
+ throw new InvalidArgumentException('Duplicate metric category/key pair.');
+ }
+ $seen[$identity] = true;
+ }
+ $this->metrics = array_values($metrics);
+ }
+
+ /** @return array{protocolVersion:int,application:string,installationId:string,schemaVersion:int,period:array{start:string,end:string},metrics:list} */
+ public function toArray(): array
+ {
+ return [
+ 'protocolVersion' => self::PROTOCOL_VERSION,
+ 'application' => $this->application,
+ 'installationId' => $this->installationId,
+ 'schemaVersion' => $this->schemaVersion,
+ 'period' => $this->period->toArray(),
+ 'metrics' => array_map(static fn (Metric $metric): array => $metric->toArray(), $this->metrics),
+ ];
+ }
+
+ private static function assertIdentifier(string $value, string $field, int $maxLength): void
+ {
+ if ($value === '' || strlen($value) > $maxLength || preg_match(self::IDENTIFIER_PATTERN, $value) !== 1) {
+ throw new InvalidArgumentException($field . ' is invalid.');
+ }
+ }
+}
diff --git a/src/ReportingPeriod.php b/src/ReportingPeriod.php
new file mode 100644
index 0000000..c8e4d05
--- /dev/null
+++ b/src/ReportingPeriod.php
@@ -0,0 +1,52 @@
+start = $start->setTimezone($utc);
+ $this->end = $end->setTimezone($utc);
+
+ $duration = $this->end->getTimestamp() - $this->start->getTimestamp();
+ if ($duration <= 0 || $duration > self::MAX_SECONDS) {
+ throw new InvalidArgumentException('Reporting period must be positive and no longer than 31 days.');
+ }
+ }
+
+ public static function monthContaining(DateTimeImmutable $instant): self
+ {
+ $utc = $instant->setTimezone(new DateTimeZone('UTC'));
+ $start = $utc->modify('first day of this month')->setTime(0, 0, 0, 0);
+ $end = $start->modify('first day of next month');
+
+ return new self($start, $end);
+ }
+
+ /** @return array{start:string,end:string} */
+ public function toArray(): array
+ {
+ return [
+ 'start' => $this->start->format('Y-m-d\TH:i:s\Z'),
+ 'end' => $this->end->format('Y-m-d\TH:i:s\Z'),
+ ];
+ }
+}
diff --git a/src/SubmissionResult.php b/src/SubmissionResult.php
new file mode 100644
index 0000000..c6dba7b
--- /dev/null
+++ b/src/SubmissionResult.php
@@ -0,0 +1,16 @@
+ */
+ public readonly array $headers;
+
+ /** @param array $headers */
+ public function __construct(
+ public readonly int $statusCode,
+ public readonly string $body,
+ array $headers = [],
+ ) {
+ $normalized = [];
+ foreach ($headers as $name => $value) {
+ $normalized[strtolower($name)] = $value;
+ }
+ $this->headers = $normalized;
+ }
+
+ public function header(string $name): ?string
+ {
+ return $this->headers[strtolower($name)] ?? null;
+ }
+}
diff --git a/src/Transport/StreamTransport.php b/src/Transport/StreamTransport.php
new file mode 100644
index 0000000..3b60609
--- /dev/null
+++ b/src/Transport/StreamTransport.php
@@ -0,0 +1,71 @@
+ $value) {
+ $headerLines[] = $name . ': ' . $value;
+ }
+
+ $context = stream_context_create([
+ 'http' => [
+ 'method' => $method,
+ 'header' => implode("\r\n", $headerLines),
+ 'content' => $body,
+ 'timeout' => $timeoutSeconds,
+ 'ignore_errors' => true,
+ 'follow_location' => 0,
+ ],
+ ]);
+
+ set_error_handler(static fn (): bool => true);
+ try {
+ $responseBody = file_get_contents($url, false, $context);
+ } finally {
+ restore_error_handler();
+ }
+
+ /** @var list|null $http_response_header */
+ if ($responseBody === false || !isset($http_response_header)) {
+ throw new TransportException('Unable to reach usage statistics server.');
+ }
+
+ $statusCode = null;
+ $responseHeaders = [];
+ foreach ($http_response_header as $line) {
+ if (preg_match('/^HTTP\/\S+\s+(\d{3})\b/', $line, $matches) === 1) {
+ $statusCode = (int)$matches[1];
+ $responseHeaders = [];
+ continue;
+ }
+ $separator = strpos($line, ':');
+ if ($separator !== false) {
+ $name = strtolower(trim(substr($line, 0, $separator)));
+ $responseHeaders[$name] = trim(substr($line, $separator + 1));
+ }
+ }
+
+ if ($statusCode === null) {
+ throw new TransportException('Server response did not contain an HTTP status line.');
+ }
+
+ return new Response($statusCode, $responseBody, $responseHeaders);
+ }
+}
diff --git a/src/Transport/TransportInterface.php b/src/Transport/TransportInterface.php
new file mode 100644
index 0000000..5caea49
--- /dev/null
+++ b/src/Transport/TransportInterface.php
@@ -0,0 +1,16 @@
+ $headers */
+ public function request(string $method, string $url, array $headers, string $body, float $timeoutSeconds): Response;
+}
diff --git a/tests/ClientTest.php b/tests/ClientTest.php
new file mode 100644
index 0000000..d9e9e89
--- /dev/null
+++ b/tests/ClientTest.php
@@ -0,0 +1,99 @@
+submit($this->report(), ConsentState::Unknown));
+ self::assertSame(SubmissionResult::SkippedWithoutConsent, $client->submit($this->report(), ConsentState::Disabled));
+ self::assertSame(0, $transport->calls);
+ }
+
+ public function testSendsProtocolPayloadWhenEnabled(): void
+ {
+ $transport = new RecordingTransport(new Response(200, '{"status":"accepted"}'));
+ $client = new Client($transport, new Endpoint('https://stats.example/api/v1/reports'), 2.5);
+
+ self::assertSame(SubmissionResult::Accepted, $client->submit($this->report(), ConsentState::Enabled));
+ self::assertSame('POST', $transport->method);
+ self::assertSame('https://stats.example/api/v1/reports', $transport->url);
+ self::assertSame(2.5, $transport->timeout);
+ self::assertSame('application/json', $transport->headers['Content-Type']);
+ $payload = json_decode($transport->body, true, 512, JSON_THROW_ON_ERROR);
+ self::assertSame(1, $payload['protocolVersion']);
+ self::assertSame('libresign', $payload['application']);
+ }
+
+ public function testMapsServerValidationError(): void
+ {
+ $transport = new RecordingTransport(new Response(400, '{"error":"invalid_report","message":"Application schema is not registered."}'));
+ $client = new Client($transport, new Endpoint('https://stats.example/api/v1/reports'));
+
+ try {
+ $client->submit($this->report(), ConsentState::Enabled);
+ self::fail('Expected exception.');
+ } catch (ServerRejectedException $e) {
+ self::assertSame(400, $e->statusCode);
+ self::assertSame('invalid_report', $e->errorCode);
+ self::assertFalse($e->isTransient());
+ }
+ }
+
+ public function testExposesTransientServerFailure(): void
+ {
+ $transport = new RecordingTransport(new Response(429, '{"error":"rate_limited"}', ['retry-after' => '60']));
+ $client = new Client($transport, new Endpoint('https://stats.example/api/v1/reports'));
+
+ try {
+ $client->submit($this->report(), ConsentState::Enabled);
+ self::fail('Expected exception.');
+ } catch (ServerRejectedException $e) {
+ self::assertTrue($e->isTransient());
+ self::assertSame('60', $e->retryAfter);
+ }
+ }
+
+ public function testRejectsUnexpectedSuccessResponse(): void
+ {
+ $transport = new RecordingTransport(new Response(200, '{"status":"different"}'));
+ $client = new Client($transport, new Endpoint('https://stats.example/api/v1/reports'));
+ $this->expectException(ProtocolException::class);
+ $client->submit($this->report(), ConsentState::Enabled);
+ }
+
+ private function report(): Report
+ {
+ return new Report(
+ 'libresign',
+ str_repeat('a', 64),
+ 1,
+ new ReportingPeriod(new DateTimeImmutable('2026-08-01T00:00:00Z'), new DateTimeImmutable('2026-09-01T00:00:00Z')),
+ [Metric::integer('usage', 'requests_completed', 72)],
+ );
+ }
+}
diff --git a/tests/EndpointTest.php b/tests/EndpointTest.php
new file mode 100644
index 0000000..d7f6406
--- /dev/null
+++ b/tests/EndpointTest.php
@@ -0,0 +1,38 @@
+expectException(InvalidArgumentException::class);
+ new Endpoint($endpoint);
+ }
+
+ /** @return iterable */
+ public static function invalidEndpoints(): iterable
+ {
+ yield 'http' => ['http://stats.example/api/v1/reports'];
+ yield 'credentials' => ['https://user:secret@stats.example/api/v1/reports'];
+ yield 'query' => ['https://stats.example/api/v1/reports?token=x'];
+ }
+}
diff --git a/tests/InstallationIdTest.php b/tests/InstallationIdTest.php
new file mode 100644
index 0000000..a6c7696
--- /dev/null
+++ b/tests/InstallationIdTest.php
@@ -0,0 +1,28 @@
+ 'usage', 'key' => 'count', 'type' => 'integer', 'value' => 3], Metric::integer('usage', 'count', 3)->toArray());
+ self::assertSame('number', Metric::number('usage', 'ratio', 1.5)->type);
+ self::assertSame('boolean', Metric::boolean('feature', 'enabled', true)->type);
+ self::assertSame('string', Metric::string('environment', 'version', '12.0.0')->type);
+ }
+
+ #[DataProvider('invalidIdentifiers')]
+ public function testRejectsInvalidIdentifiers(string $category, string $key): void
+ {
+ $this->expectException(InvalidArgumentException::class);
+ Metric::integer($category, $key, 1);
+ }
+
+ /** @return iterable */
+ public static function invalidIdentifiers(): iterable
+ {
+ yield 'empty category' => ['', 'key'];
+ yield 'spaces' => ['usage data', 'key'];
+ yield 'empty key' => ['usage', ''];
+ }
+
+ public function testRejectsInfiniteNumber(): void
+ {
+ $this->expectException(InvalidArgumentException::class);
+ Metric::number('usage', 'ratio', INF);
+ }
+
+ public function testRejectsOversizedString(): void
+ {
+ $this->expectException(InvalidArgumentException::class);
+ Metric::string('usage', 'value', str_repeat('x', 1025));
+ }
+}
diff --git a/tests/RecordingTransport.php b/tests/RecordingTransport.php
new file mode 100644
index 0000000..889f66b
--- /dev/null
+++ b/tests/RecordingTransport.php
@@ -0,0 +1,45 @@
+ */
+ public array $headers = [];
+ public string $body = '';
+ public float $timeout = 0.0;
+
+ public function __construct(private readonly Response $response)
+ {
+ }
+
+ public function request(
+ string $method,
+ string $url,
+ array $headers,
+ string $body,
+ float $timeoutSeconds,
+ ): Response {
+ ++$this->calls;
+ $this->method = $method;
+ $this->url = $url;
+ $this->headers = $headers;
+ $this->body = $body;
+ $this->timeout = $timeoutSeconds;
+
+ return $this->response;
+ }
+}
diff --git a/tests/ReportTest.php b/tests/ReportTest.php
new file mode 100644
index 0000000..a0ab576
--- /dev/null
+++ b/tests/ReportTest.php
@@ -0,0 +1,59 @@
+toArray()['protocolVersion']);
+ self::assertSame('2026-08-01T00:00:00Z', $report->toArray()['period']['start']);
+ self::assertSame('12.0.0', $report->toArray()['metrics'][0]['value']);
+ }
+
+ public function testRejectsDuplicateMetrics(): void
+ {
+ $period = new ReportingPeriod(new DateTimeImmutable('2026-08-01T00:00:00Z'), new DateTimeImmutable('2026-08-02T00:00:00Z'));
+ $this->expectException(InvalidArgumentException::class);
+ new Report('libresign', str_repeat('a', 64), 1, $period, [
+ Metric::integer('usage', 'count', 1),
+ Metric::integer('usage', 'count', 2),
+ ]);
+ }
+
+ public function testRejectsEmptyMetrics(): void
+ {
+ $period = new ReportingPeriod(new DateTimeImmutable('2026-08-01T00:00:00Z'), new DateTimeImmutable('2026-08-02T00:00:00Z'));
+ $this->expectException(InvalidArgumentException::class);
+ new Report('libresign', str_repeat('a', 64), 1, $period, []);
+ }
+
+ public function testRejectsInvalidSchemaVersion(): void
+ {
+ $period = new ReportingPeriod(new DateTimeImmutable('2026-08-01T00:00:00Z'), new DateTimeImmutable('2026-08-02T00:00:00Z'));
+ $this->expectException(InvalidArgumentException::class);
+ new Report('libresign', str_repeat('a', 64), 0, $period, [Metric::integer('usage', 'count', 1)]);
+ }
+}
diff --git a/tests/ReportingPeriodTest.php b/tests/ReportingPeriodTest.php
new file mode 100644
index 0000000..85c1ca7
--- /dev/null
+++ b/tests/ReportingPeriodTest.php
@@ -0,0 +1,41 @@
+toArray()['start']);
+ }
+
+ public function testCreatesCalendarMonth(): void
+ {
+ $period = ReportingPeriod::monthContaining(new DateTimeImmutable('2026-02-13T12:30:00Z'));
+ self::assertSame('2026-02-01T00:00:00Z', $period->toArray()['start']);
+ self::assertSame('2026-03-01T00:00:00Z', $period->toArray()['end']);
+ }
+
+ public function testRejectsNonPositivePeriod(): void
+ {
+ $instant = new DateTimeImmutable('2026-08-01T00:00:00Z');
+ $this->expectException(InvalidArgumentException::class);
+ new ReportingPeriod($instant, $instant);
+ }
+}
diff --git a/tests/ResponseTest.php b/tests/ResponseTest.php
new file mode 100644
index 0000000..ca7a5af
--- /dev/null
+++ b/tests/ResponseTest.php
@@ -0,0 +1,24 @@
+ '60']);
+
+ self::assertSame('60', $response->header('retry-after'));
+ self::assertSame('60', $response->header('RETRY-AFTER'));
+ }
+}
diff --git a/tests/StreamTransportTest.php b/tests/StreamTransportTest.php
new file mode 100644
index 0000000..962fb3d
--- /dev/null
+++ b/tests/StreamTransportTest.php
@@ -0,0 +1,25 @@
+expectException(TransportException::class);
+ $transport->request('POST', 'https://example.invalid', [], '{}', 0.0);
+ }
+}
diff --git a/tests/coverage-threshold.php b/tests/coverage-threshold.php
new file mode 100644
index 0000000..2e21b87
--- /dev/null
+++ b/tests/coverage-threshold.php
@@ -0,0 +1,25 @@
+project->metrics;
+$statements = (int)$metrics['statements'];
+$covered = (int)$metrics['coveredstatements'];
+$percentage = $statements === 0 ? 0.0 : ($covered / $statements) * 100;
+
+printf("Line coverage: %.2f%% (minimum %.2f%%)\n", $percentage, $minimum);
+exit($percentage >= $minimum ? 0 : 1);
diff --git a/tests/scoping-smoke.php b/tests/scoping-smoke.php
new file mode 100644
index 0000000..2912a17
--- /dev/null
+++ b/tests/scoping-smoke.php
@@ -0,0 +1,33 @@
+value !== 'enabled') {
+ throw new RuntimeException('Scoped enum did not load correctly.');
+}
+
+$metric = UsageStatisticsClientScoped\LibreCode\UsageStatistics\Metric::integer('usage', 'count', 1);
+if ($metric->toArray()['value'] !== 1) {
+ throw new RuntimeException('Scoped value object did not execute correctly.');
+}